[Coverage][C++] Class member initializers aren't mapped but increment wrong counters

[chapuni]

struct Foo {
  bool f = (true ? true : true);
  Foo();
};

//Foo::Foo() : f(true ? true : true) {}
Foo::Foo() {}

(https://godbolt.org/z/n6M6fPr46)

• Member initializer is not mapped
• Looks like Counter 0 is increment wrongly. Finally Counter 0 is incremented twice (+=2)
• Works as expected if the explicit member initializer is specified. (//uncomment)

As far as I investigated,

• Counter is not assigned in CodeGenPGO.cpp
• Class member initializer is not traversed in CoverageMappingGen.cpp
• Instrumentations are working in CGExpr.cpp, but counter number is 0.